Function rg_program 

pub fn rg_program() -> PathBuf

The ripgrep program to invoke: the LOCODE_RG_PATH override, else bare rg on PATH (invoked by name — PATH-hijack hygiene, per Claude Code).

Bundled self-extraction is a packaging concern layered in later (the bundle-rg feature, Task 14); if rg cannot be started, the caller surfaces a soft error rather than falling back to a divergent hand-rolled search.